1. Sampling of Particulate Materials: Theory and Practice;Gy,1979
2. New Approaches to Geochemical Analysis and Sampling;Ingamells;Talanta,1974
3. Sampling for Chemical Analysis;Kratochvil;Anal. Chem.,1981
4. Sampling Chemical Analysis;Laitinen,1975
5. The Sampling of Bulk Materials;Smith,1981